Search for dissertations about: "PM"

Showing result 16 - 20 of 302 swedish dissertations containing the word PM.

  2. 16. Net-Shape Consolidation of Water-Atomised and Gas-Atomised Steel Powder Towards Full Density

    Author : Anok Babu Nagaram; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hot isostatic pressing; high temperature sintering; sintering atmosphere; cold isostatic pressing; Powder metallurgy; Prealloyed with Cr PM steel; high density; PM steel;

    Abstract : Powder metallurgy (PM) provides resource- and cost-efficient routes to create near-net shape products compared to conventional metal fabrication techniques. To improve the mechanical performance of PM steels, it is a prerequisite to enhance the density of the material. READ MORE

  4. 17. A comparative cost analysis of conventional wrought steel and powder metallurgy (PM) gear manufacturing technologies

    Author : Babak Kianian; Industriell Produktion; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gear manufacturing; Manufacturing cost analysis; Powder metallurgy PM ; Press and sintering P S ; Wrought steel conventional gear manufacturing; Decision support system DSS ; Sustainability; Sustainable production SP ; Automotive Industry;

    Abstract : The transportation industry landscape is going through a massive transformation due to trends such as autonomous and electrified vehicles. The electrification trend has already started to display its ample influence on the automotive industry. READ MORE

  5. 18. Microstructure and Fatigue Analysis of PM-HIPed Alloys : A Focus on Inconel 625 and High-Nitrogen Tool Steel

    Author : Faezeh Javadzadeh Kalahroudi; Mikael Grehk; Mattias Calmunger; Karlstads universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; powder metallurgy; hot isostatic pressing; Inconel 625; high-nitrogen tool steel; microstructure; fatigue behavior; inclusions; Materialteknik; Materials Engineering;

    Abstract : Nickel-based superalloys and tool steels are well-known high-performance alloys due to their extensive use in many different industries. Nickel-based superalloys have found their way into aircraft, aerospace, marine, chemical, and petrochemical industries owing to their excellent high-temperature corrosion and oxidation resistance. READ MORE

  6. 19. Power Control Systems for PM Synchronous Flywheel Alternators

    Author : Janaína Goncalves de Oliveira; Uppsala universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Flywheel systems are attractive in hybrid and electric vehicles, being able to handle the large power when accelerating and for regenerative braking. The combination of a flywheel device with a battery source has several advantages, such as higher peak power capacity, higher energy density and a decrease of the number of charging/discharging cycles in the battery. READ MORE

  7. 20. Measuring and Modelling PM Levels on Underground Platforms

    Author : Minghui Tu; Ulf Olofsson; Teresa Moreno; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Airborne particles; railway; underground platform; particle concentration; effect factor; Luftburna partiklar; järnväg; underjordisk plattform; partikelkoncentration; effektfaktor; Machine Design; Maskinkonstruktion;

    Abstract : Urban railways have become an essential part of the transportation network of cities due to their convenience and high capacity. To make full use of urban space, many urban railway platforms are built underground. READ MORE